139429427 has 16 divisors (see below), whose sum is σ = 154939392. Its totient is φ = 124798080.

The previous prime is 139429417. The next prime is 139429463. The reversal of 139429427 is 724924931.

It is a cyclic number.

It is not a de Polignac number, because 139429427 - 2¹⁶ = 139363891 is a prime.

It is a super-2 number, since 2×139429427² = 38881130227096658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139429417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73748 + ... + 75614.

It is an arithmetic number, because the mean of its divisors is an integer number (9683712).

Almost surely, 2^139429427 is an apocalyptic number.

139429427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

139429427 is a deficient number, since it is larger than the sum of its proper divisors (15509965).

139429427 is a wasteful number, since it uses less digits than its factorization.

139429427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098.

The product of its digits is 108864, while the sum is 41.

The square root of 139429427 is about 11808.0238397456. The cubic root of 139429427 is about 518.5430456804.

The spelling of 139429427 in words is "one hundred thirty-nine million, four hundred twenty-nine thousand, four hundred twenty-seven".